Surface Anatomy

Question 1

what muscle forms the rounded lateral contour of the shoulder?

Answer 1

deltoid

Question 2

what is the nerve supply to the deltoid?

Answer 2

axillary

Question 3

which muscle forms anterior fold of the axilla?

Answer 3

pectoralis major

Question 4

what is the nerve supply to the pectoralis major?

Answer 4

medial and lateral pectoral nerve

Question 5

what is the nerve supply to the trapezius?

Answer 5

spinal accessory nerve

Question 6

which muscle forms the posterior fold of the axilla?

Answer 6

lat dorsi

Question 7

what is the nerve supply of the lat dorsi?

Answer 7

thoracodorsal nerve

Question 8

what is a winged scapula?

Answer 8

scapula lifts away from thoracic cage

Question 9

nerve supply to the supraspinatus?

Answer 9

supra scapular nerve

Question 10

what is the nerve supply of the infraspinatus?

Answer 10

supra scapular nerve

Question 11

at what point in the abduction arc does the scapula start to move?

Answer 11

about 30 degrees

Question 12

what structures lie deep to the clavicle?

Answer 12

brachial plexus and 3rd part of the subclavian vessels

Question 13

what muscles are attached to the coracoid process?

Answer 13

pectoralis minor
coracobrachialis
short head of biceps

Question 14

why is the coracoid process important in surgery?

Answer 14

keeps surgeon away from brachial plexus and axillary artery

Question 15

what ligaments are attached to the coracoid process?

Answer 15

coracohumeral
coracoacromial
coracoclavicular

Question 16

why is the subachromial bursa significant?

Answer 16

important landmark in steroid injection

Question 17

what is the function of the supraspinatus?

Answer 17

initiates abduction

Question 18

function of the subscapularis?

Answer 18

internal rotation

Question 19

function of the infraspinatus and teres minor?

Answer 19

external rotation

Question 20

what attaches to the lateral epicondyle of the humerus?

Answer 20

extensor origin
note ridge proximally

Question 21

what is the function of a bursa?

Answer 21

decreases friction between 2 surfaces

Question 22

where is the radial nerve and posterior Interosseus nerve in relation to the lateral epicondyle?

Answer 22

radial nerve - 4 finger breadths above
PIN - 2 finger breadths below

Question 23

which forearm muscles does the radial nerve supply before it gives off PIN?

Answer 23

brachioradialis
extensor carp
radialis longus

Question 24

what is tennis elbow?

Answer 24

degenerative tendinitis of the extensor origin

Question 25

where is the ulnar nerve in relation to the epicondyle?

Answer 25

behind epicondyle, may sublet or dislocate in some individuals

Question 26

what does the ulna nerve pass under on its way into the forearm?

Answer 26

the cubital tunnel retinaculum (CTR) and between the 2 heads of FCU

Question 27

what muscle attaches to the top of the olecranon?

Answer 27

triceps

Question 28

what is the nerve supply to the triceps?

Answer 28

radial nerve

Question 29

what is an effusion?

Answer 29

fluid in a joint

Question 30

what types of effusion can occur?

Answer 30

synovial fluid, blood, pus, gas

Question 31

which muscle provides powerful supination of the forearm?

Answer 31

biceps

Question 32

what is the nerve supply to the biceps?

Answer 32

músculo cutaneous nerve

Question 33

where does biceps tendon insert?

Answer 33

radial tuberosity

Question 34

what joint is responsible for the flexion and extension of the elbow joint?

Answer 34

ulno-trochlear

Question 35

what joint is responsible for the pronation/supination of the elbow joint?

Answer 35

proximal and distal radioulnar